﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Example04_CSharp
{
    class CRectangle
    {
        int width;
        int height;
        public CRectangle(int a,int b)
        {
            width=a;
            height=b;
        }
        public int area()
        {
            return(width*height);
        }
    }
    class Program4
    {
        static void Main(string[] args)
        {
            CRectangle recta=new CRectangle(3,4);
            CRectangle rectb=new CRectangle(5,6);
            Console.WriteLine("rect a:{0}",recta.area());
            Console.WriteLine("rect b:{0}",rectb.area());
        }
    }
}
